#include <STC15F2K60S2.H>

void system_int()
{

	P0 = 0XFF;
	P2 = P2 &0X1F |0X80;
	P2 &= 0X1F;
	
	P0 = 0X00;
	P2 = P2 &0X1F |0XA0;
	P2 &= 0X1F;
	
}